函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\time\timekeeping.c Create Date:2022-07-27 11:42:33
Last Modify:2020-03-12 14:18:49 Copyright©Brick
首页 函数Tree
注解内核,赢得工具下载SCCTEnglish

函数名称：timekeeping_suspend

函数原型：int timekeeping_suspend(void)

返回类型：int

参数：无

1738  tk等于timekeeper
1745  ad_persistent_clock64 - Return time from the persistent clock.* Weak dummy function for arches that do not yet support it.* Reads the time from the battery backed persistent clock.* Returns a timespec with tv_sec=0 and tv_nsec=0 if unsupported.
1752  如果 seconds 或 nanoseconds 则Flag for if there is a persistent clock on this platform = true
1755  Flag reflecting whether timekeeping_resume() has injected sleeptime = true
1757  raw_spin_lock_irqsave( & timekeeper_lock, flags)
1758  write_seqcount_begin( & seq)
1759  mekeeping_forward_now - update clock to the current time* Forward the current clock to update its state since the last call to* update_wall_time(). This is useful before significant clock changes,
1760  lag for if timekeeping is suspended 等于1
1767  curr_clock等于clock
1768  cycle_now等于cycle_last
1769  clocksource_start_suspend_timing(curr_clock, cycle_now)
1771  如果Flag for if there is a persistent clock on this platform 则
1778  delta等于sub = lhs - rhs, in normalized form
1779  delta_delta等于sub = lhs - rhs, in normalized form
1780  如果abs - return absolute value of an argument*@x: the value. If it is unsigned type, it is converted to signed type first.* char is treated as if it was signed (regardless of whether it really is)* but the macro's return type is preserved as char.( seconds )大于等于2则
1785  old_delta等于delta
1786  否则
1788  ime in seconds when suspend began for persistent clock 等于timespec64_add(ime in seconds when suspend began for persistent clock , delta_delta)
1793  must hold timekeeper_lock
1794  halt_fast_timekeeper - Prevent fast timekeeper from accessing clocksource.*@tk: Timekeeper to snapshot.* It generally is unsafe to access the clocksource after timekeeping has been* suspended, so take a snapshot of the readout base of @tk and use it as the
1795  write_seqcount_end( & seq)
1796  raw_spin_unlock_irqrestore( & timekeeper_lock, flags)
1798  tick_suspend()
1799  clocksource_suspend()
1800  clockevents_suspend()
1802  返回:0